Electrical warp stop motion



Filed `June 27,`

FIG. 1

u w or im w w, my E O NA m V w a u V n \L N@ u u. fm A m Q 5 l O un @JW 11H V a|\ N I f@ ma a fg Mlm u@ LWN 5 /H mw m W 5 .D/ lJlill nwfhmg n@ lun of myV present invention Patented Feb. 28, 1933 UNITE-Dj STAT-Es PATENTfOFFICE caminar.v PAYNE, or WORCESTER, MASSACHUSETTS, Assiefnn To rCRoMPToN a xNoWLEs Loom WORKS, oF WORCESTER, MASSACHUSETTS, A eoRroRATIoN or MASSACHUSETTS ELECTRICAL WAnP-s'roPMoTIoN Application filed June 27, 193e. serial No; 464,355.

This invention relates to improvements in electrical Warp stop motions and it is the general object of the invention to provide simplified means for connecting the several live electrodes of a vvarp stop motion capable of operating with a varying-number of con`- tact bars. Y V

In my co-pending application' Ser. N o.

I 350,401 there'is' .shown a` built-u`p Warp stop motion formed'ef Ya 4plurality of groups of nit's, the groups' being variable in number and substantially similar so' that a small or relatively large number of banks of drop Wires' maybe acomm'odated.V Each contact bar has a' grounded and a live electrode, and it isnecessary to have all of the live electrodes energized regardless of theV number of contact bars` in use. It is an important objectl vto provide a readily expansible connector for the live electrodes so arranged that when additional bars are added their live electrodes may be electrically connected to those' already in use.

l Itis a further object of my present inveni tion to extend the live electrodes bevond' those which are grounded and attach them together' by means of a longitudinal member passing through them and on which may 30 be strung a plurality of spacers which are ofthe correct length to hold the extended ends in the samel spaced relationship as exists for theV main part of the contact bars. Y

lVith' these and other objects in view Which ,35, will appear as the description proceeds,my

invention resides in the combination `and arrangement'of parts hereinafter described and set forth in the claims.

Y In the accompanying drawing wherein a o convenientembodiment of my invention is set forth,

Fig. 1 is a top plan View of one end of a. Warp stop motion having my invention applied thereto,

F ig. 2 is a vertical section on an enlarged scale taken on line2-2 of Fig.y 1,

Fig 3 is a. vert-ical section online 3-3, Fig.

i Fig. 4 is a `perspective view of one end of a contact bar made to cooperate With my invention,` and Fig. 5 is a diagrammatic viewg'sliowing myy invention appliedv to the use of a smaller number of contact bars than that shown in Referringto Figs. 1 and 2,1 have shownva loom frame' 10gan`d a Whip roll ll together with a bracket 12 secured inliXed relation to the loom frame.. i bearing member 13 of an angle iron the threaded end, 15 ofwhich is lparallel tothe Warpand is held VAV vertically adjustable receives the short end 14,'

in angular relationrvvith respect thereto by means of set screw' 16. Onthe threaded end 15 are front and rear clamping nuts 17 between which lie a ,plurality of substantially similarl spacing and supporting units 18., L0- Vcated betweenthe units are electric contact bars 19,` loca-ted preferably above the angle iron, and separator` bars 20 located below the angle iron, as shown in F ig. 2. VIt is sufficientrfor present Vpurposes, to .state that the number of units 18 may be Vvaried according to the demands of the Warp and that the clamping "screws hold thevunits and theirl ture.

Eachl` detector bar includes al grounded electrode 21 having its upper and lower edges rounded as at 22 and 23,'respectively, and having' a rib 24 parallel to the edges and eX- tending i' longitudinally `along its y vertical Wall 25; The live electrode 26 may be l0cated' Within Y with a part of the drop Wire D, While other portions of the drop Wire engage the rib 24' and insulated from ythe lgrounded electrode., A vertical exposed surface 27 of the live electrode is adapted for engagement ,85

to effect a lateral movement of the drop wire when the latterxfalls. Y The matter thus far described issubstantially the same as that set forth in my afore-k said application, the grounded electrodes 21 all being electrically connected to the frame of a loom or other machine by means of yangle 915.

iron, contact of the bars vto the ground being established by the units 18 and the clamping nuts.

, In order to, electrically connect the live.

electrodes 26 I ,extend each electrodeas at 40 and provide it With an open slot 41 to receive bars as a substantially rigid unitary strucl5,

- ducting' sleeves or spacers L6 :as 'are required, ait-er a head 43 and a threaded a. nut 45. Slipped on said electricl current conwhich, as shown in Figs. l anc 3, lie between the extended ends of the live electrodes. There will ordinarily be one spacer between adjacent Vlive electrodes, the number `oli spacers depending upon the number of contact bars. An electric wire 47' may washer 'llSllocated intermediate the nut 45 and one. of the end live electrodes. Another washer 49 may be located between the head 43 `and the opposite live electrode, if desired. As shown diagrammatically in Fig. 5 there are two live'elcctrodes and a single spacer 46, thel latter being of such length as to lit between the liveelectrodes 'ithoutvdetlecting the'same when the clanfipinp,` 'nuts 17' are in place. .It it be desired to expand the width ot the stop motion by adding` additional bars this may be d one by removing' one of the nuts 17 .and puttin fr in place as many contact bars which additional spacers lli may be strung 'along` the bolt l2 so as to electrically connect each oi the live electrodes. Thenut 45 will then be tightened to hold the spacers securely against the live electrodes, with the spacers and bolt supported Jy the live relectrodes. The boltl is made long enough to satisfy the needs of the wid- Hmotion, but-'with narrow motions only that part of itis' actually used which is needed.V p

' YVillen thc drop wire a bolt l2 hav-ing end lll on which is bolt is a` plurality of falls a circuit will be established between thegrounded electrode and the correspondinglive electrode, whereupon currentwill liow through the wire 47' along` the bolt l2 and establish an external circuit not shown but of the usual typev and effective to stop the loom or'give other indication Vthat a detect exists in the warp.

'From the foregoing it will be seen that VI have provided a simple means for electrical-r ly connecting the live electrodes and that this means is so constructed as to permit the ready expansion of the motionjby the addition of eXtrar contact bars. It will further bev seen that the connection between said live electrodes is supported by the contact bars so that there 'isno necessity1 for Valigningl the unit'svlS with the contacts inasmuch as the latteradapt themselves to the'unifled structure, It'will further be seen that a single electrical connection with the bolt LlQsuii-ices to energize all of the live electrodes and that by reason of the open slot ell a new bar mayk be slipped longitudinally in position without requiring the removalv of the'bolt 42 from the original live electrodes.

Having thus described my invention it will be seen Athat changes :and modifications may be made therein by-those skilled in the art withoutdeparting from the spirit and scope of the y'invention and I do not wish tobe lim- Vbe clamped between aA ited to the details herein disclosed, but what I claim is:

l. In a warp stop motion having a plurality of similar spacing units each positioning an electric contact bar, a live electrode for each bar, a built-up connecting means for the electrodes including` a support common to the electrodes and separate 'contacting elements on the support located between and in contact with the electrodes, there being a unit for each element. f

Q. In a warp stop motionv having aplurality of similar spacing` units each positioning an electric contact bar, a live electrode for each bar, a series of `contact spacers located transversely of the bars, and means to clamp said spacers to electrodes to electrically connect the electrodes, there beinga unit for each element.

3. VIn a Warp ity o 'similar spacingvunits cach positioning an electric contact bar, a live electrode for each bar, a set of spacers made of current conducting material, the electrodes and spacers alternating, and means to clamp the spacersand electrodes'together to electrically connect the electrodes-` Y 4l. In a warp stop motion having a pluralityoif similar spacing units each positioning an electric Contact bar, a live electrode tory each bar, a set of current conducting spacers, each electrode having contact with at least one spacer, and means to clamp the spacers and electrodes together to electrically connect he electrodes.

5. In a warp stop motion having a pluralityV of electric contact bars which -may vary innumber, a live electrode for each bar, a bolt extending transversely of the bars, a set of current conducting spacers strung along the bolt, and clamping means to hold the elec#v trodes and spacers in electric Contact.

6. Ina Warp stop motion having a plurality of electric contact bars which mayvaryv in number, a live electrode for each bar, alongitudinally extending; support transverse 'of the bars and extending through the elec-k trodes,fcurrent conducting spacers separato from and mounted on the support and engaging the electrodes, and means to clamp the spacers together to establish electricv con# tact with the electrodes. f 1 e P(.In a warp stop motion having a plu-y rality of similar units each positioning an electric contact bar and capable of having additional units added thereto, a support fixed my sign ature.

OSCAR V. PAYNE. 

